[MCN] Half a degree rise in global warming will triple area of Earth too hot for humans

[Lance Olsen]

4-Feb-2025
Half a degree rise in global warming will triple area of Earth too hot for humans
KING'S COLLEGE LONDON
PEER-REVIEWED PUBLICATION

New assessment warns area the size of the USA will become too hot during extreme heat events for even healthy young humans to maintain a safe body temperature if we hit 2°C above preindustrial levels.

For those aged over 60, the same 2°C rise would see more than a third of the planet’s land mass cross this critical ‘overheating’ threshold 

JOURNAL
Nature Reviews Earth & Environment
 <https://www.eurekalert.org/news-releases/1072291>https://www.eurekalert.org/news-releases/1072291



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PNAS October 6, 2022


https://doi.org/10.1073/pnas.2210525119 

OPINION


Climate change and the threat to civilization 

Daniel Steela, C. Tyler DesRochesb,1 , and Kian Mintz-Wooc,d 

1st 2 paragraphs

In a speech about climate change from April 4th of this year, UN General Secretary Antonio Guterres lambasted “the empty pledges that put us on track to an unlivable world” and warned that “we are on a fast track to climate disaster” (1). Although stark, Guterres’ statements were not novel. Guterres has made similar remarks on previous occasions, as have other public figures, including Sir David Attenborough, who warned in 2018 that inaction on climate change could lead to “the collapse of our civilizations” (2). In their article, “World Scientists’ Warning of a Climate Emergency 2021”—which now has more than 14,700 signatories from 158 countries—William J. Ripple and colleagues state that climate change could “cause significant disruptions to ecosystems, society, and economies, potentially making large areas of Earth uninhabitable” (3). 

Because civilization cannot exist in unlivable or uninhabitable places, all of the above warnings can be understood as asserting the potential for anthropogenic climate change to cause civilization collapse (or “climate collapse”) to a greater or lesser extent. Yet despite discussing many adverse impacts, climate science literature, as synthesized for instance by assessment reports of the Intergovernmental Panel on Climate Change (IPCC), has little at all to say about whether or under which conditions climate change might threaten civilization. 


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